Reinforcement for pneumatic tires and method of forming same.



G. F. MURRAY.

REINFORCEMENT FOR PNEUMATIC TIRES AND METHOD OF FORMING SAME.

APPLICATION FILED JULY 2, 1908.

949,156. Patented Feb.15,1910.

Wifn asses [777 271 for Charles. 17/! may CHARLES F. MURRAY, OF DETROIT, MICHIGAN.

REINFORCEMENT FOR PNEUMATIC TIRES AND METHOD OF FORMING SAME.

Specification of Letters Patent.

Patented Feb. 15, 1910.

Application iiled July 2, 1908., Serial No. 441,655.

To all whom it may concern:

Be it known that I, CHARLES F. MURRAY, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Reinforcements for Pneumatic Tires and Methods of Formin Same, of which the following is a speci cation, reference being had therein to the accompanying drawings.

The invention relates generally to. pneumatic tires for vehicles, and particularly to a reinforcement therefor acting to prevent puncture of the tire and at the same time aving substantially the same pliability and resiliency as the tube.

The invention consists in the construction of the reinforcement and in the method or process of forming the same, as will be mbre fully hereinafter pointed out.

In the drawings illustrating my invention,-'Figure 1 is a sectional view throu h suitable apparatus for carrying out t e method; and Fig. 2 is a cross section through a pneumatic tire, with the lining applied.

A represents a vehicle tire of any ordinary construction, in this-instance a single tube, and B is the reinforcement, preferably in the form of a lining extending as shown entirely about the interior of the tire, and having a relatively thick section adjoining the tread acting to reinforce the latter and prevent puncture.

The compound of which the lining is composedis characterized by being elastic and pliable and forms the subject-matter of another and pendin application. It consists" primarily of a eliquescent salt, such as ma esium chlorid, and starch, or other equivalent substance. The magnesium chlorid in solution is mixed preferably with a corresponding amount by weight of ordinary starch, the mixture having the consistency of thick cream.

The tire to be reinforced is first deflated and partially filledwith the mixture described. The tire is then inflated, the compound distributed therein preferably over the entire inner surface with a maximum amount in the tread to form a linin and in practice 15 simultaneously solidified, forn1- mg the des red relnforcement.

oefi'ect the solidification, the compound is-subjected to heat at a temperature ranging from 212 .to 220 de ees Fahrenheit, andv for a period ranging om one to two and section of the one-half hours. During the operation of ment.

Any suitable apparatus may be employed for carrying out'the steps of the method set forth above. I preferably use a heater or oven. as D, in the form of a closed casing havin a hinged door E, and provided interi'or y with a suitable radiator F.

G are standards within the casing, having forked upper ends a, to which are detachably journale the" shaft 5, carryin a wheel 0, constituin a suitable form on w ich the tire is mounte The wheel is slowly rotated during the operation of heating by anysuitable drive mechanism, such as a belt d, a ulle c fixed to'the-shaft b, and a drive pu ley 1 upon a suitable driven shaftg, the drivin means extending outside the casing throng a suitable slot or opening h.

The reinforcement, by reason of the material of which it is formed, adheres to the tire, and is thus held in its proper position under all conditions in use. The rotation of the forming wheel carrying the tirecauses a relatively large amount of the lining material to adhere to the tread ortion of the tube, thereby roducing a re atively thick lining at the desired point.

A reinforcement or lining of the character described is superior in many respects to a solid fillin or core, as while practically performing t e same function so far as a tread reinforcement is concerned it is considerably-lighter than the solid filling and less expensive. Further, as will be obvious, any ordinary tire may be detached from its wheel and reinforced, which allows the lining to be efl'ected at a central point and the tire returned to the user to be applied to the vehicle wheel.

What I claim as my invention is,-

1. The herein-described method of reinforcing pneumatic tires, consistin in injecting within the pneumatic tube e astic fluid material, theninflating the partially filled tire, rotating the tire to distribute the fluid material over the inner surface of the tread 2. Theherein-describedmethod of lining' pneumatic tires, consisting in partially filling a pneumatic tube with a dehquescent salt and starch in fluid form, distributing the fluid over the'tire tread, and solidifying the fluid b Cooking.

3. T 'e herein-described method of lining.

pneumatic tires consistin in partially fillin% a gneumatlc tube with a deliquesc'ent sa t an starch in fluid form, in then inflating the tube, subsequent]. rotatin the latter to effect a distribution 0 the fluid about the tread section of the tire and subjecting the tion of the tire.

4. The herein-describedmethod of rein-- forcing pneumatic tires, consisting in artially filling the tire with an elastic uid material, rotating'the tire to distribute the material over the tread section,' and solidifying the material by heat.

In testimony whereof I afix my signature in presence of two witnesses.

CHARLES F. MURRAY.

Vvitnessesz' NELLIE KINsELLA, HARRY W. GALVIN.

,fluid to the action of heat duringthe rota- 

